Jeremy Corbyn will today accuse Boris Johnson of being “Britain’s Trump, the fake populist and phoney outsider” as he urges voters to back Labour if a snap general election is called in the autumn.

The Labour leader will say a national poll will provide a “once-in-a-generation chance” for a change of direction of politics on the scale of 1945 or 1979, when Clement Attlee and Margaret Thatcher won the keys to Number 10, respectively.

He will warn the country is facing a Brexit “crisis” and vow to do “everything necessary” to prevent a no-deal exit from the European Union.

Mr Corbyn is expected to say: “While Brexit is the framework of the crisis we face, the problems facing our country run much deeper.

“A general election triggered by the Tory Brexit crisis will be a crossroads for our country. It will be a once-in-a-generation chance for a real change of direction, potentially on the scale of 1945 or 1979. Things cannot go on as they were before.”

Labour’s Laura Pidcock says it is

He will add: “However the Brexit crisis is resolved, the country faces a fundamental choice.

“Labour offers the real change of direction the country needs: a radical programme to rebuild and transform communities and public services, invest in the green jobs and high tech industries of the future, and take action to tackle inequality and climate crisis.

“The Tories have lurched to the hard right under Boris Johnson, Britain’s Trump, the fake populist and phoney outsider, funded by the hedge funds and bankers, committed to protecting the vested interests of the richest and the elites, while posing as anti-establishment.”

Mr Corbyn will go on to say: “Labour believes the decision on how to resolve the Brexit crisis must go back to the people.

“And if there is a general election this autumn, Labour would commit to holding a public vote, to give voters the final say, with credible options for both sides, including the option to remain.”

Labour’s plan for ‘interim’ government explained

His election pitch later on Monday – in a speech in Corby, Northamptonshire – comes amid growing speculation of an election in the coming weeks.

It also follows his direct appeal to the leaders of other political parties and senior backbenchers from across parliament last week to oust Mr Johnson in a vote of no confidence and install him as “temporary” prime minister to block a no-deal Brexit and form a government of national unity.

The SNP and Plaid Cymru have suggested they could support Mr Corbyn’s idea, while a number of Conservative MPs opposed to no-deal have indicated they would hold talks with him.

Lib Dem leader Jo Swinson who initially rejected the idea has since said she would be willing to hold talks with Mr Corbyn – but has reiterated her belief that someone else must lead an emergency government if Prime Minister Johnson is removed from office.

Conservative Party chairman James Cleverly said: “Jeremy Corbyn has done all he can to frustrate delivering on the referendum result.

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“This is a cynical attempt to seize power by a man who would wreck the economy, is soft on crime and won’t stand up for Britain. All Jeremy Corbyn offers is more dither and delay.

“Only Boris Johnson and the Conservatives can provide the leadership Britain needs and deliver Brexit by October 31, whatever happens.”